I have submitted 2 Form 1’s for SBRs. Each listed multiple calibers for the build (223 Rem & 300 BLK). Both of the Tax Stamps I received listed only one caliber (223 Rem).
My lawyer says ATF Policy is to list only one caliber on the tax stamp, but any caliber can be used on that lower.
Unfortunately, my lawyer couldn’t give me a written reference for that policy.
My concern is local police may not be well versed in ATF Policy and assume I have an undocumented SBR.
Can anyone out there tell me if this policy is in writing and if so, where do I find it?
Thanks,
Kevin

I put the caliber in 4c, .223, and then in 4h, Additional Description, I put that the gun could also be used in .22 LR and 9mm calibers. Stamp was approved last week on the 27th after 273 days but I have not got it back in the mail yet. Since it was not kicked back they must have been OK with the wording.

I put the caliber in 4c, .223, and then in 4h, Additional Description, I put that the gun could also be used in .22 LR and 9mm calibers. Stamp was approved last week on the 27th after 273 days but I have not got it back in the mail yet. Since it was not kicked back they must have been OK with the wording.

Doug

Got my stamp in the mail this afternoon. I guess when I made out the Form 1 I did 2 different iterations. The one I sent in did not list different calibers in the Additional Description area, sorry. I seem to remember I read somewhere that it would not be accepted that way.

the ATF told me, through the “Ask the Experts” section on the Eforms site, that you just have to notify them at the address on the form of any additional configurations, ( Barrel length, caliber, overall length, etc). They will add it to the registry for you. from what I understand, temporary changes to the config are fine, aka changing upper to a different caliber or length.

From my understanding, The form 1 is to “Make” the firearm in it’s “First” caliber. I do not know of an AR with multiple barrels all firing at the same time from the same receiver. It would make a very weird looking quad rail. You would only need to relist (update) the caliber if you were unable to return it to the original configuration. An an example would be if the firearm was made as a 5.56 (HK 53 as an example), had a barrel replaced, and pressed and pinned into the trunnion (Say 300 blackout). You could no longer easily convert it back to 5.56. As long as you can “easily” return it (barrel swap) to the description on the form, you should be OK. So, never get rid of the “First” barrel on your SBR.

As for policy, A lot of the framework for this comes from the United States v. Thompson/Center Arms Co. case in what makes a SBR and conversions.http://stephenhalbrook.com/tc.html